﻿/**
 * Copyright (C) 2011 original author and authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace NGuice.Inject.Internal.Util
{
    /// <summary>
    /// 执行简单的性能监视
    /// </summary>
    public class Stopwatch
    {
        private static readonly EventLog logger = Logger.GetLog(typeof(Stopwatch));

        private long start = DateTime.Now.ToFileTimeUtc();

        public long Reset()
        {
            long now = DateTime.Now.ToFileTimeUtc();
            try
            {
                return now - start;
            }
            finally
            {
                start = now;
            }
        }

        public void ResetAndLog(string label)
        {
            logger.WriteEntry(label + ": " + Reset() + "ms");
        }
    }
}
